SAE-AISI 1040 (S40C, C40, 1.0511, G10400) Carbon Steel

SAE-AISI 1040 is an alloy of iron, further classified as a carbon steel. 1040 is the SAE-AISI designation for this material. 1.0511 is the EN numeric designation. And G10400 is the UNS number.

It has two common variants, each represented as a separate material. The Material Properties section below shows ranges encompassing all variants. For more specific values, follow the links in the Variant Materials section.

Material Properties

Base Metal Price3.0 % rel

Brinell Hardness160 to 180

Density7.8 g/cm3 (490 lb/ft3)

Elastic (Young's, Tensile) Modulus210 GPa (30 x 106 psi)

Elongation at Break13 to 19 %

Modulus of Resilience (Unit Resilience)230 to 670 kJ/m3

Poisson's Ratio0.29

Specific Heat Capacity450 J/kg-K

Strength to Weight Ratio72 to 81 kN-m/kg

Tensile Strength: Ultimate (UTS)560 to 630 MPa (81 to 91 x 103 psi)

Tensile Strength: Yield (Proof)310 to 530 MPa (45 to 77 x 103 psi)

Thermal Expansion12 µm/m-K

Unit Rupture Work (Ultimate Resilience)62 to 72 MJ/m3

The length of each bar compares the given value to the highest value in the database.

Alloy Composition

Iron (Fe)98.6 to 99.03 %

Manganese (Mn)0.6 to 0.9 %

Carbon (C)0.37 to 0.44 %

Sulfur (S)0 to 0.050 %

Phosphorus (P)0 to 0.040 %

Further Reading

ASTM A29: Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for

Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008